Thread: 4l60e gone nuts
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Old 03-19-2022, 08:44 PM
Schurkey Schurkey is offline
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Re: 4l60e gone nuts

Quote:
Originally Posted by Jacobpettiet View Post
I’ve been searching the web for this same exact problem and a solution. I know it’s been 12 years but do you remember how to fix this?
Wild Guess: Excess debris in the pan from a failing transmission. Debris gets sucked into the filter, plugging it. Trans slips because pump is starving for fluid.

Shut engine off, some slight back-flow in the filter dislodges some debris. Pump can pull fluid through the partially-plugged filter until it sucks more debris into the filter which fully plugs the media. Pump starves for fluid, trans slips.

At best, you could change the filter, clean the pan, flush the fluid and hope for the best. At worst--and more likely--it's time to overhaul the transmission.

When my 700R-4 in my '88 K1500 did that, I found pieces of the 2--4 band laying in the pan, and disassembly revealed that the planetary gears had broken teeth.
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